Pete,
Thanks, that means a lot more coming from top quality contributors/researchers like you and Rev. I really admire the way that Rev leaves records (picuretrail) to be added to at any time. His data collection will probably outlive all of us.
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The reason I didn't post the Hiler patent (34961)is because his patent marks the beginning of decarburized/compressed steel shotgun barrels (1869)...it would be another 20 years before the industry really began to utilize this technology. More to follow...